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<div><a href="../index.html">Home</a> &gt;  <a href="index.html">utilities</a> &gt; ST_example.m</div>

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<h1>ST_example
</h1>

<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>Example usage of Sediment Toolbox</strong></div>

<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="box"><strong>function ST_example </strong></div>

<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre class="comment"> Example usage of Sediment Toolbox

 function example

 DESCRIPTION:
    Demonstrate ST Toolbox functionality 

 INPUT:

 OUTPUT:
    
 Author(s):  
    Geoff Cowles (University of Massachusetts Dartmouth)

 Revision history
   
==============================================================================</pre></div>

<!-- crossreference -->
<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
This function calls:
<ul style="list-style-image:url(../matlabicon.gif)">
<li><a href="ST_Dstar.html" class="code" title="function [dstar] = ST_Dstar(d,varargin)">ST_Dstar</a>	Calculate non-dimensional grain size D*</li><li><a href="ST_erate.html" class="code" title="function [erate] = ST_erate(d,varargin)">ST_erate</a>	Calculate erosion rate in kg/(m^2-s)</li><li><a href="ST_phi2d.html" class="code" title="function [d] = ST_phi2d(phi)">ST_phi2d</a>	Convert sediment grain size from phi to d (m)</li><li><a href="ST_taucr.html" class="code" title="function [taucr] = ST_taucr(d,varargin)">ST_taucr</a>	Calculate critical shear stress in Pascals</li><li><a href="ST_wentworth.html" class="code" title="function [Sclass] = wentworth(phi)">ST_wentworth</a>	Report wentworth class of a particular grain size phi</li><li><a href="ST_wset.html" class="code" title="function [wset] = ST_wset(d,varargin)">ST_wset</a>	Calculate settling velocity of particle diameter d (m) in m/s</li></ul>
This function is called by:
<ul style="list-style-image:url(../matlabicon.gif)">
</ul>
<!-- crossreference -->



<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../up.png"></a></h2>
<div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function ST_example</a>
0002 <span class="comment">% Example usage of Sediment Toolbox</span>
0003 <span class="comment">%</span>
0004 <span class="comment">% function example</span>
0005 <span class="comment">%</span>
0006 <span class="comment">% DESCRIPTION:</span>
0007 <span class="comment">%    Demonstrate ST Toolbox functionality</span>
0008 <span class="comment">%</span>
0009 <span class="comment">% INPUT:</span>
0010 <span class="comment">%</span>
0011 <span class="comment">% OUTPUT:</span>
0012 <span class="comment">%</span>
0013 <span class="comment">% Author(s):</span>
0014 <span class="comment">%    Geoff Cowles (University of Massachusetts Dartmouth)</span>
0015 <span class="comment">%</span>
0016 <span class="comment">% Revision history</span>
0017 <span class="comment">%</span>
0018 <span class="comment">%==============================================================================</span>
0019 close all;
0020 fprintf(<span class="string">'       phi          class       d(mm)    Dstar    wset(mm/s)  taucr (Pa)  erate x1e-3(kg/(m^2-s))\n'</span>)
0021 i = 0;
0022 <span class="keyword">for</span> phi=-8:11
0023     i = i + 1;
0024     phiclass    = <a href="ST_wentworth.html" class="code" title="function [Sclass] = wentworth(phi)">ST_wentworth</a>(phi);
0025     d(i)        = <a href="ST_phi2d.html" class="code" title="function [d] = ST_phi2d(phi)">ST_phi2d</a>(phi);
0026     Dstar(i)    = <a href="ST_Dstar.html" class="code" title="function [dstar] = ST_Dstar(d,varargin)">ST_Dstar</a>(d(i));
0027     Wset(i)     = <a href="ST_wset.html" class="code" title="function [wset] = ST_wset(d,varargin)">ST_wset</a>(d(i));
0028     Taucr(i)    = <a href="ST_taucr.html" class="code" title="function [taucr] = ST_taucr(d,varargin)">ST_taucr</a>(d(i));
0029     erate(i)    = <a href="ST_erate.html" class="code" title="function [erate] = ST_erate(d,varargin)">ST_erate</a>(d(i));
0030     fprintf(<span class="string">'%10d %20s %8.4f %8.2f %9.4f %8.3f %8.3f\n'</span>,phi,phiclass,d(i)*1000,Dstar(i),Wset(i)*1000,Taucr(i),1000*erate(i))
0031 <span class="keyword">end</span>;
0032 
0033 loglog(d*1000,Taucr)
0034 title(<span class="string">'critical shear stress'</span>)
0035 xlabel(<span class="string">'Grain diameter (mm)'</span>)
0036 ylabel(<span class="string">'critical shear Pa'</span>)
0037 axis([.01,10,.01,10])</pre></div>
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